Résumé du preprint Irfu-11-124

Irfu-11-124
Measurement of the nuclear multiplicity ratio for Ks0 hadronization at CLAS
A. Daniel et al (H. Moutarde, S. Procureur, F. Sabatié)
The influence of cold nuclear matter on lepto-production of hadrons in semi- inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the Ks0 multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy z transferred to the Ks0 and the transverse momentum squared p2T of the Ks0. We find that the multiplicity ratios for Ks0 are reduced in the nuclear medium at high z and low p2T , with a trend for the Ks0 transverse momentum to be broadened in the nucleus for large p2T .